第13题: [单项选择]患儿女,5岁,因服用隔夜的小白菜1小时候出现头晕,呕吐,查体口唇甲床明显青紫,呼吸30次/分,轻度三凹征,双肺呼吸音清,心率100次/分,未闻及明显杂音,该患儿青紫主要原因为() A. 呼吸衰竭 B. 氰化物中毒 C. 亚硝酸盐中毒 D. 有机磷中毒 E. 心脏右向左分流 参考答案:C 答案解析:新鲜蔬菜煮熟后存放过久,亚硝酸盐含量会明显增高,其次亚硝酸盐能与血液中的血红蛋白结合,生成高铁血红蛋白,使其不能与氧结合,所以患儿口唇及甲床出现青紫。
A. forces you to pay attention to him B. frequently changes his point of view C. says things you wish you had said yourself D. wants to be considered entertaining 参考答案:A